Sample Size Calculator Decision Tool

This tool is intended to help NGOs compare different sample size calculators and choose which one is most appropriate based on the study type, user’s skill level, and preferred calculator format. The tool requires at least a beginner level of knowledge on quantitative survey design/methods and sample size calculations. All of the sample size calculators included in this tool, along with their associated formulas, were reviewed and quality assured by Statistics Without Borders in partnership with Save the Children.